摘要
在共混挤出聚丙烯(PP)/滑石粉复合材料过程中,通入二氧化碳以辅助加工并由此保护滑石粉的微观片状结构。研究了超临界二氧化碳(SC-CO2)通气量、加工温度、螺杆转速对滑石粉微观片状结构形貌和复合材料性能的影响。结果表明:CO2通气量越大、加工温度越高,加工过程中滑石粉的微观片状结构被破坏程度越小;螺杆转速越高,滑石粉的微观片状结构被破坏程度越大;微观片状结构破坏程度较小的滑石粉,其PP/滑石粉复合材料的拉伸模量和弯曲模量较高。
Supercritical CO2 was fed into the process of extruding the mixture of polypropylene and talc,and so as to assist protecting the laminated microstructure of talc. The effects of supercritical CO2 dose, temperature and screw speed on the microscopic morphology structure of talc and PP/Talc composite properties were studied. The results showed that the more supercritical CO2,the more well-defined morphology. The laminated structure of talc could be preserved better at a higher temperature. However, the destruction of the laminated microstructure of talc became more serious if screw speed increased. The tensile modulus and flexural modulus of composite were enhanced.
出处
《塑料》
CAS
CSCD
北大核心
2013年第2期27-30,共4页
Plastics
